多通道单光子电离的阿秒动力学

Attosecond dynamics of multi-channel single photon ionization.

作者信息

Peschel Jasper, Busto David, Plach Marius, Bertolino Mattias, Hoflund Maria, Maclot Sylvain, Vinbladh Jimmy, Wikmark Hampus, Zapata Felipe, Lindroth Eva, Gisselbrecht Mathieu, Dahlström Jan Marcus, L'Huillier Anne, Eng-Johnsson Per

机构信息

Department of Physics, Lund University, P.O. Box 118, 22100, Lund, Sweden.

Physikalisches Institut, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 19, 79104, Freiburg, Germany.

出版信息

Nat Commun. 2022 Sep 3;13(1):5205. doi: 10.1038/s41467-022-32780-5.

DOI:10.1038/s41467-022-32780-5

PMID:36057622

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9440915/

Abstract

Photoionization of atoms and molecules is one of the fastest processes in nature. The understanding of the ultrafast temporal dynamics of this process often requires the characterization of the different angular momentum channels over a broad energy range. Using a two-photon interferometry technique based on extreme ultraviolet and infrared ultrashort pulses, we measure the phase and amplitude of the individual angular momentum channels as a function of kinetic energy in the outer-shell photoionization of neon. This allows us to unravel the influence of channel interference as well as the effect of the short-range, Coulomb and centrifugal potentials, on the dynamics of the photoionization process.

摘要

原子和分子的光电离是自然界中最快的过程之一。对这一过程超快时间动态的理解通常需要在很宽的能量范围内对不同角动量通道进行表征。利用基于极紫外和红外超短脉冲的双光子干涉技术，我们测量了氖原子外壳层光电离中各个角动量通道的相位和振幅随动能的变化。这使我们能够揭示通道干涉的影响以及短程、库仑和离心势对光电离过程动力学的影响。